Navigation Links
Scientists Spot Eyes' Motion Sensors
Date:10/11/2007

Tough-to-detect cells do the job, physicists say

THURSDAY, Oct. 11 (HealthDay News) -- U.S. scientists say they've identified a type of retinal nerve cell that helps humans, monkeys and apes see motion.

The discovery of this "upsilon cell" may help improve understanding of vision in humans and other primates. The finding, by high-energy physicists at the University of California, Santa Cruz, and neuroscientists at the Salk Institute in La Jolla, Calif., was published in the Oct. 10 issue of the Journal of Neuroscience.

There are only a small number of upsilon cells, which makes them difficult to find when using traditional techniques. The discovery was made using a new detection system -- with 512 electrodes on an area about the size of a pinhead -- inspired by the UCSC scientists' research looking for particles in high-energy-physics collisions.

"This has been a fantastic journey through high-energy physics, neurobiology, technology, and human health," study senior author Alan Litke, adjunct professor of physics at UCSC's Santa Cruz Institute for Particle Physics, said in a prepared statement.

Biologists have identified about 22 distinct types of primate retinal nerve cells but only know the functions of about a half dozen of them.

"People have looked at cell morphology, but that can't tell us in any detail how the cell responds to light," Litke said. "If we're interested in how the retina is processing visual information, we really want to focus a movie on it and see what it reacts to -- to find out if it's seeing color, responding to motion, or whatever it might be doing."

Litke and his colleagues projected simple movies through a microscope lens and onto a patch of retina. As the rod and cone cells picked up the images, they sent electrical signals to different kinds of retinal nerve cells. Further research revealed the presence and distribution of the upsilon cells and their likely role in detecting motion.

More information

The Washington University School of Medicine in St. Louis has more about the eyes.



-- Robert Preidt



SOURCE: University of California, Santa Cruz, news release, Oct. 9, 2007


'/>"/>
Copyright©2007 ScoutNews,LLC.
All rights reserved

Related medicine news :

1. Nobel Prize for Medicine shared by Three scientists
2. Scientists plan human cloning clinic in the United States
3. Scientists crack mechanism of Leptin-Obesity Hormone
4. Scientists use plant hormones to fight cancer
5. American scientists alter gene makeup of babies
6. Expose on eating disorders!! Scientists trace “brain’s eating control center pathway”
7. Scientists found ancient Human Germ Killer
8. Scientists locate key hormone involved in appetite control
9. Scientists open the book of life
10. Electronic nose by Italian scientists
11. Scientists review SARS
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:6/26/2016)... , ... June 26, 2016 , ... ... once they have been diagnosed with endometriosis. These women need a treatment plan ... require a comprehensive approach that can help for preservation of fertility and ultimately ...
(Date:6/25/2016)... ... 2016 , ... First Choice Emergency Room , the largest network of ... Medical Director of its new Mesquite-Samuell Farm facility. , “We are pleased to ... said Dr. James M. Muzzarelli, Executive Medical Director of First Choice Emergency Room. ...
(Date:6/24/2016)... Los Angeles, CA (PRWEB) , ... June 24, 2016 , ... ... plastic surgery procedures that most people are unfamiliar with. The article goes on to ... known procedures, but also many of these less common operations such as calf and ...
(Date:6/24/2016)... MIAMI, Fla. (PRWEB) , ... June 24, 2016 , ... ... Florida Trend magazine’s 2016 Legal Elite. The attorneys chosen by their peers for this ... of Florida. , Seven Greenberg Traurig Shareholders received special honors as members of this ...
(Date:6/24/2016)... ... June 24, 2016 , ... ... the Clinical Decision Making in Emergency Medicine conference in Ponte Vedra Beach, FL. ... articles published in Emergency Medicine Practice and Pediatric Emergency Medicine Practice. ...
Breaking Medicine News(10 mins):
(Date:6/23/2016)... , June 23, 2016 Research and ... Global Market - Forecast to 2022" report to their ... treatment method for the patients with kidney failure, it replaces ... fluid from the patient,s blood and thus the treatment helps ... and chloride in balance. Increasing number of ...
(Date:6/23/2016)... , June 23, 2016 Roche (SIX: ... 510(k) clearance for its Elecsys BRAHMS PCT (procalcitonin) assay ... sepsis or septic shock. With this clearance, Roche is ... a fully integrated solution for sepsis risk assessment and ... with bacterial infection and PCT levels in blood can ...
(Date:6/23/2016)... -- Bracket , a leading clinical trial technology and ... platform, Bracket eCOA (SM) 6.0, at the 52 nd ... 2016 in Philadelphia , Pennsylvania.  A demonstration ... of its kind to fully integrate with RTSM, will be ... is a flexible platform for electronic clinical outcomes assessments that ...
Breaking Medicine Technology: